Howdy. Here's a basic question about the labeling of inductors (those that resemble small electrolytic capacitors), commonly used in switching power supplies. I searched the web on the answer to this but found no specific answer on inductors, only for capacitors.
Here's the situation, I have some lose inductors which are labeled 224C and I can't figure out their micro-Henry reading just by looking at that code.
Inductors labeled as such are present in circuits I have at hand (RW's 4LW and GeekKlok) and their schematics call for 220 uH (micro-Henry) parts, so I wonder if that's the correct inductor to be there in the first place.
The schematics of other circuits I have (standalone switching power supply, for instance) also call for inductors with a 220 uH reading, and the one actually installed in the unit is labeled 221 (which, borrowing from capacitors, I suppose could mean "22 and 1 zero", bringing it to 220, while uH would be the unit of choice).
But the labeling on the 224C inductor puzzles me a bit. Could it be that it means "22 plus four zeroes" - 220 thousand ***pico-Henries*** (which equals 220 micro-Henries)? If so, how to avoid this kind of confusion in the units used?
Thanks
Marco
